Throttle control



Aug. 20, 194s.-

Original Filed .Dec. 22, 1941 P. M. 'WAITE 7 THROTTLE CONTROL J9 awe/whom 4 Sheets-Sheet 1 u 20,1946- P. M. WAITE 2,406,273

' I THROTTLE CONTROL I Original Filed Dec. '22, 1941 4 Sheets-Sheet 2 gw m Aug. 20, 1946. x T -r; 2,406,273

THROTTLE CONTROL Original Filed Dec. 22, 1941 4 Sheets-Shasta Aug. 20, 1946. P. M. wAlTE THROTTLE CONTROL Original Filed Dec. 22, 1941 4 Sheets-Sheet 4 9 M a 4 1 W 4 3? un HH K WM W -HHMN- W/ 7 I n M z l l |I||||| L 0 4 w. J M J m V w n a 5 M Patented Aug. 20, 1946 UNITED STATES PATENT OFFICE THROTTLE CONTROL Philip M. Waite, Corry, Pa.

Continuation of application Serial N0."424,080,

December 22, 1941.

This application 1944, Serial No. 546,643

15 Claims. 1

with lost motion means associated with the lever and additional levers for operating the additional levers after the first lever has been shifted.

Another object of this invention is to provide in a device of this kind a main or throttle controlling lever and an operative connection between this lever and another lever, whereby the other lever will be actuated after the first lever has been initially moved a predetermined distance and the other lever will have the movement thereof accelerated after the other lever has moved a predetermined distance.

' A further object of this invention is to provide a device of this kind which is adapted to be July 26,

In the drawings:

Figure 1 is a detail front elevation, partly broken away, of a throttle control constructed according to an embodiment of this invention.

Figure 2 is a sectional view taken on the line 2-2 of Figure 1,

Figure 3 is a sectional view 33 of Figure 2,

Figure 4 is a fragmentary sectional view similar to Figure 3, but showing the control in the taken on the line opposite or open position,

mounted in airplanes so that the operator or whereby the supercharger associated with the i engine will be actuated after the main throttle has been operated a predetermined degree and initially the supercharger control will move at the same speed as the main throttle control, but will have the movement thereof accelerated prior to the time that the main control is in a fully open position.

A further object of this invention is to provide in a device of this kind means whereby the position of the additional levers withrespect to the main throttle lever may be adjusted to any desired point so that the time of the movement of the additional lever or levers may be varied within a predetermined range.

A further object of this invention is to provide a controlling means of this kind which can be incorporated in certain portions of the present 7 throttle controlling structure so that the improved or accelerated controlling means may be used as an attachment or substitute for the present controlling means,

To the foregoing objects and to others which may hereinafter appear, the invention consists of the novel construction, combination and arrangement of parts as will be more specifically referred to and illustrated in the accompanying drawings, wherein are shown embodiments of the invention, but it is to be understood that changes, variations and modifications may be resorted to which fall within the scope of the invention as claimed.

Figure 5 is a detail side elevation of one of the lever operators,

Figure 6 is a detail side elevation of another of the lever operators, 7

V Figure '7 is a detail side elevation of one of the spacing washers,

Figure 8 is a fragmentary side elevation, partly broken away, of one of the control levers,

Figure 9 is a fragmentary vertical section of a modified form of this invention,

Figure 10 is a sectional'view taken on the line llllil of Figure 9, 1 Figure-11 is a detail side elevation of the ratche embodied in the form shown in Figures 9 and 10, I Figure 12 is a fragmentary vertical section of a further modification of this invention, and

Figure 13 is a sectional view taken on the line l3l3 of Figure 8.

Referring to the drawings, and first to Figures 1 to 8 inclusive, the numeral l5,designates generally a framestructure including a rear substantially sector-shaped frame member 16 and a front frame member I! of substantiall sector shape. A cylindrical hub 18 is fixedly mounted 2?: in the frame I5 being threadedinto a central plate !9 which constitutes a clamping plate and is formed at its center with a boss 20. The rear frame member i6 is formed witha body 2| having an opening 22 within which the rear end of '3 the hub 13 engages. The body 2| is also formed with a rabbet or annular recess 23 within which the outer annular flange 24 of the plate I9 engages. The frame member I! is also provided with a body 25 having an opening 26 therein within which the forward end of the hub I8 engages.

The two frame members I6 and I1 are of like construction and each frame member is provided with a pair of upwardly divergent arms 21 and v 23 extending from the bodies 2| and 25 thereof,

upper end thereof.

' a a r 2,406,273

3 downwardly extending arm or lever 32 formed with a plurality of openings 33 to which the connecting elements are adapted to be secured. The lever 30 also includes an upwardly extending arm or lever member 34 provided with an obtusely bent upper portion 35 having a knob 36 on the A stationary washer 31 is disposed on the forward side of the hub or annulus 3| and, as shown in Figure '7, is provided with an outwardly extending ear 38 having a notch 39. The notch 39 is adapted to receiveja frame holding bolt 40 extending through the lower portions of the frame members [6 and I1 so that the washer or wear member 31 will be held against rotation relative to the hub 3|.

7 A rotatable spacing ring 4| is rotatably mounted on the hub l8 and is provided with an annular flange 42. A second or forward lever, generally designated as 43, is rotatably mounted on the hub l8 and includes a central ring-shaped hub 44 provided with a downwardly extending radial arm 45. The arm 45 is apertured similar to the arm 32 in order to permit attachment of connections from the desired element controlled by movement of the lever 43. The lever 43 also includes an upwardly extending radial arm 46 which is formed with a forwardly or obtusely bent extension 41 disposed upwardly and outwardly of the frame structure I5. The upper terminal end of the extension 41 has a knob 48 mounted thereon to facilitate movement of the lever 43. A forward friction washer 49 is mounted on the hub |8 bearing against the forward side of the annular hub 44 of the lever 43, and a spider shaped spring member 50 is adapted at its outer end portions to bear against the forward side of the friction washer 49. The washer 49 is similar in construction to the washer 31 shown in more detail in Figure '7.

The spider 50 is mounted on a stationary axial- 1y disposed shaft or bolt which is threaded at its rear end in the boss 2|]. A spider tensioning nut 52 is threaded on the forward end of the bolt 5| andbears against the spider 50 so that adjustment of the nut 52 will provide the desired tension against the forward washer 49 and against the other elements mounted on the hub l8. 'By providing the washer 31 stationary and the washer 49 also stationary, the two levers 30 and 43 may be frictionally held against movement and at the same time movement of the lever 30. will not effect a similar movement of the'lever 43, except as hereinafter described.

In order to provide a means whereby the forward lever 43 may be partially rotated through a lost motion connection with the lever 30, I have provided an annulus 53 which'is mounted on the spacer 4| rearwardly of the flange 42. The annulus 53 has formed integral therewith an upwardly extending sector-shaped body 54 which is formed in its upper edge with an elongated longitudinally curved recess 55. The opposite ends 56 and 51 of the recess 55 form abutments which are adapted to be engaged by a forwardly extending stud 58 fixed to the lever member 34 within the frame [5. The stud 58 is movable through the length of the recess 55, but when the stud 53 reaches either the abutment 56 or the abutment 51, the lever operating member 54 will rotate with the remaining movement of the lever 33. The annulus 53 is fixedly secured relative to the hub or annulus of the lever- 43 by means .of one or more rivets or fastening members 59 which engage through the annulus 53, the'fiange42 and also the annulus 44.

4 I A rear lever generally designated as 60 is rockably mounted on the hub l8 rearwardly of the lever 30. The lever 60 includes an annular hub 6| which is rotatably mounted on the stationary hub l8 and also includes a radially disposed lever arm 62 terminating at its upper end in an obtusely and forwardly bent extension 63. The extension 63 at its upper terminal end has a knob 64 mounted thereon. A'friction washer B5 is mounted on the hub |3 and bears at its forward side against the rear side of the hub 3| of the lever 33. The friction washer 65 is similar in every detail to the friction washer 31. An annular spacing member 66 is rotatably mounted onthe hub I8 bearing at its forward side against the rear side of the friction washer 65. A friction washer 6'! is interposed between the rear side of the annular spacing washer 66 and the forward side of the hub 6| of the lever'60.

A rear friction washer 68 bears against the rear side of the hub 6| of the lever 60 and also bears against the forward side of a rear spacing washer 69. The rear spacing washer 69 at its rear side bears against the forward side of the stationary frame member 2|. The spacing member 66 is formed with an annular flange 1|] intermediate the forward and rear ends thereof, and an annulus H is mounted on the spacing member 66 and bears against the forward side of the flange 13. The annulus 1| is fixed relative to the rotatable spacing member 66 by means of one or more rivets or fastening members 12 which engage through the flange 10. The annulus 1| has formed integral therewith a radially extending plate 13 which is formed with a V-shaped cam track 14. 7

An accelerating lever 15 is rockably mounted on a pivot member 16 which engages the lever 30, and the accelerating lever 15 is provided adjacent the opposite ends thereof with rearwardly extending rollers or studs 11 and 18. The stud or roller 18 is adapted to engage within the cam track 14, as shown 'in'Figure 2. In order to provide a means whereby the plate 13 with the annulus or hub 1| may be rotated'in an accelerated movement through a portion of the movement of the lever 30', I have provided a pair of stop or abutment members 19 and which are fixed to a longitudinally arcuate connecting bar 8|. When the lever 30 is moved clockwise, the roller or stud 11 will strike the abutment or stop 19 so that'additional forward movement of the lever 3|] will cause the lever 15 to rock on the pivot 16 whereupon the roller or stud 18 engaging within the cam track 14 will swing the plate 13 forwardly in an accelerated movement. The position of the pivot 16 with respect to the two rollers 11 and 18 will determine the degree of either acceleration or deceleration of the plate 13 with respect to the lever 30.

An annular member 82 is mounted on the spacer 63, bearing against the rear side of the flange 10 and the rivets or fastening members 12 engage through the annulus 82 so as to hold the annulus 82 against rotation relative to the spacer E8. The annulus 82 constitutes a ratchet memher, being provided with a plurality of ratchet teeth 83. The annulus 82 is also formed with a pair of outwardly extending stop members or abutments 84 and 85 at opposite ends of the teeth 33, as shown in Figure 1. The abutments 84 and spect to the ratchet structure 82. The dog 86 is mounted on the lever 69, as shown in Figure 8, and is constantly urged to a ratchet engagin position by means of a spring 88 having an end portion thereof anchored or fixed in a notch 89 formed in the lever 69. 1

The dog 86 is manually rocked to a releasedposition to permit adjustment of the lever 69 with respect to the ratchet 82 by means of a dog releasing lever 99 which is pivotally mounted on a pivot 9| engaging through the lever 69 adjacent the upper end portion thereof. A flexible connecting member 93 is connected at its upper end, as at 94, with the lever 99 and is connected as at 95 with the dog 86. A spring 96 engages against the knob 64 being seated in a recess 91 formed in the knob 64 and bears at its outer end against the lever 99. The connecting member 93 is preferably in the form of a flexible wire and is substantially embedded within the lever 69. Preferably, the lever 69 is formed with a longitudinally extending channel 98 along one edge thereof within which the connecting member 93 loosely engages. In practice, the adjacent ed e of the lever 69 and the forward side of the frame meming groove and the outer edges of the lever 69 on opposite sides of the groove are then bent inwardly as at 99 so as to close the groove and form the closed channel 98. The lever 69 adjacent the upper end portion of the channel 98 is formed with a cutout I99 and the lever 69 adjacent the dog 86 is also formed with a cutout I9I.

In order toprovide a means whereby the levers 39, 43 and 69 may be slidably maintained within the frame I5, a pair of friction bars I92 and I93 are disposed on opposite sides of each of the levers and are longitudinally curved similar to the ba 8I. A spacer bar I94 is interposed between the rear side of the frame member I1 and the friction bar I92, and a spacer bar I95 is interposed between the spacer bar I93 and the adjacent bar I92 on the forward side of the lever I93, A spacer bar I91 is also interposed between thespacer bar I93 associated with the lever 39 and the spacerbar I92 associated with the lever 69. A rear spacer bars I94, I95, I95, I91 and I98. The lower spacer or friction bar I 93 associated with the lever 59 is formed with a longitudinally extendber I6.

A pair of bolts I99 extend through the upper opposite portions of the frame members I6 and I1 and also engage through the opposite end portions of the spacer members I92 and I93 and the spacer bar I98 is interposed between the rear portions of the frame I5 are connected together by means of lower bolt members I I9 and I I I. The hub member I8 at its forward end is provided with a plurality of slots II2 within which the arms of the spider 59 loosely engage so that the adjustment of the nut 52 will place the desired pressure upon the friction washers and spacers engaging about the hub I8.

Referring now to Figures 9, and 11, there is disclosed a modified form of this invention wherein the frame structure I5 is similar to the frame structure I5 and a cylindrical stationary hub I8 is mounted within the frame structure I5 A throttle lever or controlling member 39 is rockably mounted on the hub I 8 and additional levers I I3 and H4 are rockably mounted on the hub I8 forwardly of the lever 39 The lever 39 is constructed identical with th lever 39, being provided with a pivoted accelerating lever which has mounted on the adjacent opposite ends thereof rollers or studs 11 and 18 of an accelerating member 13 similar to the member 13, shown in Figure 6, and the roller 11? extends above the member 13 for engagement with either of the abutments or lever operating members 19 and 89, shown in Figure 3.

The hub 1I of the accelerator member 13 is mounted on a spacer member 69 which is rotatable on the hub I 8 and bears against a flange "I9 formed integral with the spacer member 66 A ratchet member H5 is mounted on the spacer member 66 and bears against the forward side of the flange 19 The ratchet member H5 is provided with ratchet teeth H6 and a pair of abutments or stop members H1 and H8 for limiting the circumferential adjustment of the adjusting dog II9 which is pivotally carried by the rear side of the intermediate lever H3. The adjustment of the dog H9 is effected in a manner similar to the adjustment of the dog 86. A pair of friction washers I29 and I2I are disposed in opposite sides of the hub 3 I of the lever 39 and are constructed identical with the friction washer 31 shown in Figure '1. A rear spacing member I22 is interposed between the forward side of the rear frame member I6 and the washer I29. The spacing member 66 bears against the forward side of the friction washer I 2I. The intermediate lever II3 is provided with an annular hearing or hub I 23 rotatably engaging 0n the hub Hi and a pair of friction washers I24 are interposed between the rear side of the bearing I23 and the forward side of the spacing member 66. A friction washer I25 is also mounted on the hub I8 and bears against the forward side of the bearing member I23. A spacing washer or ring I26 is rotatably mounted on the hub I8 and. bears at its rear side against the friction washer I 25. The spacing member I26 is provided with an annular flange I21, and an annulus I28 is mounted on the spacer I26 and bears against the rear side of the flange I21. The ratchet member H5 is provided with a pair of diametrically opposed forwardly offset ears I29 and the annulus I28 is also provided with a pair of rearwardly offset ears I3. The ears I29 and I39 are connected together by means of fastening members I3I in the form of rivets or the like so that the annulus I28 will rotate with the ratchet member member I26 by means of one or more fastening members I32 in the form of rivets which extend through the annulus I28 and the flange I21 as shown in Figure 10. A ratchet member 82*- which is identical with the ratchet 82 is mounted on the spacing member I26 and bears against the forward side of the flange I21. The ratchet member 82 is fixed relative to the flange I21 and also relative to the ratchet member II5 by the rivets I32 which extend through the flange I21, the annulus I29 and also the ratchet member 82*. A spring-pressed pivoted dog I33 which is similar in every detail to the dog 86 is pivotally mounted on a pivot member I34 carried by the lever H4. The dog I33 is manually rocked upwardly to a ratchet disengaging position by a lever similar to the lever 99, shown in Figure 8.

A friction washer I35 is mounted on thehub I 8 and bears against the forward side of the ratchet 82 The lever H4 is provided with an annular bearing member or hub I36 rotatably engaging on the hub I8 and a forward friction washer I31 is mounted on the hub I8 and bears against the forwardside of the bearing or hub "shapedtensioning member 513? is mounted on a Referring now to Figure 12, there is disclosed a further modification of this invention which relates solely to the accelerator lever or member. As shown in Figure 12, the accelerator member I38 is, formed with an elongated opening I39 which. is radial with respect to the annular hub M of the accelerator member I38 and a roller MI carried by one end of. an accelerator lever I42 engages within the opening or slot I39. The lever I39 is pivotally mounted as at M3 on a throttle lever I44 similar to the lever 30. The opposite end of the lever I42 is provided with a roller I 45 which is adapted to engage a pair of abutments I46 and I41 formed'in the opposite ends of a'longitudinally arcuate spacer bar M8. Itv will be apparent from the foregoing that the shape of the cam track, which in Figure 6 is shown as of substantially triangular configuration and in Figure 12' as an elongated slot, may be varied to provide for the desired lost motion between the main controlling lever and the associated levers which are to. be accelerated in their movement with the main lever.

In the use and. operation of this control means, the main throttle or controlling lever 38 may be initially disposed, in the forward position as shown in. Figure 3. When it is desired to acce1erate. the. engine, the lever 3a is rocked counterclockwise or to. the left as shown in Figure 3. During the initial'rocking of the lever 39 me counterclockwise movement, the. accelerating lever or kicker 15 will rock counterclockwise at its. upper end without movement of the accelerating member 13.. As the lever 39 is rocked further in a counterclockwise. movement, the accelcrating member 13 will move therewith at the.

same speed for a. portion of. the additional rockin of the lever 30.

When. the roller or stud H strikes the abutment or cam 39., the accelerating lever or kicker 75 will be rocked thereby effecting an. increase inthe rotary movement of the accelerator memher 13. As the lever 60. is fixedly connected with the accelerating member I3 through the dog 86 and the ratchet 82, the lever 60 will have the rocking movement thereof increased during the latter portion of the rocking movement of the.

main lever 38. V I a At the same time that the lever 38 is being rockedrearwardly, the forward. lever 43 will be rocked in a counterclockwise movement. The lever 23 on its forward side has fixed thereto the stud 58 which engages within the arcuate recess or notch 55701;" the plate as. When the stud 58 strikes the abutment 51, the plate 54 will rotate at the same speed. as the lever 3.9. The length of the recess or notch 55 in the plate 54 will determine the extent of the lost motion between the. plate 54 and the lever 3!]. As the lever 43 is fixedly connected with the plate 54 when the plate 54. rocks on the hub I8, the lever 43 will also. rock therewith and at the same speed as the remaining rocking movement of the lever 30.

, With the construction shown, in Figures 9,

and 11, it will be apparent that a number of additional levers may be connected with the accelerated lever operated by the lever 3% so that a number of engines may be controlled from the mainthrottle lever, and these engines accelerate in their operation in the same manner as the:

construction shown in Figures 1 to 8 inclusive. What is claimed is: 1. An engine control comprising a frame, a

'main lever pivotally carried by said frame, a.

second lever pivotally carried by said frame, a lever accelerating means carried by said main lever, means fixed relative to said frame engage able with said accelerating means for effecting operation of said accelerating means upon movement of said main lever, and means fixed relative to said second lever engageable with said accelerating means for effecting accelerated movement of said second lever upon operation of said accelerating means by said second means.

2;. An engine control comprising a frame, a lever pivotally carried by said frame, a second lever pivotally carried by said frame, and an accelerating means for effecting accelerated movement of said second lever upon movement of said first lever, said accelerating means including a pivoted member carried by said first lever, means fixed relative to said frame for rocking said member upon movement of said first lever, and means fixed relative to said sec- 0nd lever engageable with said member for effecting accelerated movement of said second lever upon rocking of said member.

3. An engine control comprising a frame, a lever pivotally carried by said frame, a second lever pivotally carried by said frame, and an accelerating means for efiecting accelerated movement of said second lever upon movement of said first lever, said accelerating means including a pivoted member carried by said first lever, means fixed relative to said frame for rocking said mem.-- ber upon movement of said first lever, and means fixed relative to said second lever engageable with said member for effecting accelerated movement of said second lever upon rocking of said member, said latter means being so correlatedv with said member as to provide for initial movement of said first lever without movement of said second lever and initial movement of said second lever at the same speed as said first lever with finalmovement of said second lever at a greater speed than the movement of said first lever.

4. An engine control comprising a frame, a lever pivotally carried by said frame, a second lever pivotally carried by said frame, a swingable operator for said second lever pivotally carried by said first lever, a part pivotally carried by said frame engageable with said operator for rotating said part with at least a portion of the swinging of said first lever, a ratchet fixed relative to said part, and a spring pressed dog carried by said second lever engaging said ratchet for holding said second lever in circumferentially adjusted position relative to said part.

. 5.. An engine control. comprising a frame, a lever pivotally carried by said frame, a pair of levers also pivotally carried by said frame, means correlated with said frame, said first. lever and -w one lever of said -pair of levers providing a differone of said pair of levers providing a differential movement relative to said first lever and said one lever, means connecting said pair of levers together, said connecting means including means whereby the other of said pair of levers may be adjusted relative to said one lever, and means for adjusting said one lever relative to said first lever and to said other lever.

7. An engine control comprising a frame, a rockable controlling lever carried bysaid frame and movable in one direction to increase engine speed and movable in the opposite direction to decrease engine speed, a second rockable lever, a common pivot for said levers and correlated means carried by said frame and said levers for effecting accelerated movement of said second lever in the same direction as and upon the movement of said controlling lever during a portion of the movement of said controlling lever in either direction.

8. An engine control comprising a frame, a rockable controlling lever carried by said frame and movable in one direction to increase engine speed and movable in the opposite direction to decrease engine speed, a second rockable lever, a common pivot for said levers, correlated means carried by said levers for effecting delayed movement of said second lever with movement of said first lever in either direction during a portion of the movement of the latter, and means carried by said frame engageable with a portion of said first means for effecting accelerated movement of said second lever during another portion of the movement of said first lever in either direction.

9. An engine control comprising a frame, a rockable controlling lever carried by said frame and selectively movable in opposite directions, a second rockable lever carried by said frame, a common pivot for said levers, correlated means carried by said levers for effecting a delayed movement of said second lever at the same speed and in the same direction as said first lever, and stationary means carried by said frame engageable with said first means for effecting an increase in the speed of said second lever after said first and second levers have moved a predetermined distance at the same speed.

10. An engine control comprising a frame, a controlling lever rockably carried by said frame, a second lever rockably carried by said frame, an elongated operator for said second lever, means pivotally mounting said operator between the ends thereof on said first lever, a part fixed to said frame engageable with one end of said operator whereby to swing the opposite end of the latter inwardly toward the axis of said second lever after said first lever has moved a predetermined distance in one direction, and means fixed relative to said second lever engageable with the opposite end of said operator whereby inward swinging of said opposite end of said operator will effect accelerated movement of said second lever in the same direction as the movement of said first lever. 7

11. An engine control comprising a frame a controlling lever rockably carried by said frame, a second lever rockably carried by said frame, an elongated operator for said second lever, means pivotally mounting said operator between the ends thereof on said first lever, a part fixed to said frame engageable with one end of said operator whereby to swing the opposite end of the latter inwardly toward the axis of said second lever after said first lever has moved a predetermined distance in one direction, and means fixed relative to said second lever engageable with the opposite end of said operator whereby said first lever will initially move in one direction without. movement of said second lever, and whereby subsequently said first and second levers will move at the same speed and in the same direction, said latter means upon engagement of said operator with said part effecting accelerated movement of said second lever in the same direction as the movement of said first lever.

12. An engine control comprising a frame, a rockable controlling lever carried by said frame and movable in one direction to increase engine speed and movable in the opposite direction to decreaseengine speed, a second rockable lever, a common pivot for said levers, correlated means carried by said levers, so constructed and arranged that said first lever will initially move in one direction without movement of said second lever, said means effecting subsequent movement of said second leve at the same speed as said first lever with said first lever in advance of said second lever and means engageable with said first means for effecting movement of said sec ond lever at an accelerated speed with respect to said first lever during the final movement of said first lever.

13. An engine control comprising a frame, a

rockable controlling lever carried by said frame and movable in one direction to increase engine speed and movable in the opposite diretcion to decrease engine speed, a second rockable lever, a common pivot for said levers, correlated means carried by said levers so constructed and arranged that said first lever will initially move in either direction without movement of said second lever, said means effecting subsequent movement of said second lever at the same speed as said first lever with said first lever in advance of said second lever and means engageable with said first means for effecting movement of said second lever at an accelerated speed with respect to said first lever during the final movement of said first lever.

14. Acontrol device comprising a frame, a main lever pivotally carried by said frame and having selective clockwise or counter-clockwise movement, a secondary lever pivotally carried by said frame, a common pivot for said levers, and means, including at least a portion pivotally carried by said frame, correlated with both of said levers to provide a lost motion between said secondary lever and the main lever in at least one phase of movement of said main lever in either direction and for effecting differential movement of said secondary lever with respect to said main lever in another phase of movement of said main lever in the same direction, said secondary lever moving in the same direction as said main lever in either the clockwise or counter-clockwise movement of said main lever said correlated means effecting equal movement of said secondary lever in the same direc- 

